I dont think its been mentioned here, but I've just found that the Vision Pro App Store is now live in The UK.
Previously I had to log into my US linked Apple ID to get app updates, but today I didn't need to.
Same for Vision OS updates (although there's isn't a new update.)

I had a look around for any UK specific apps like Sky TV, BBC iPlayer, TNT sport etc - but nothing there. Hopefully some will show up when deliveries start next week.